For repairs and parts, you can still get it. Just contact Ah Wah. Contact info available at pinned topics.
My previous Atr averages around 5.8 to 6.5km/L. On highways, I get around 7+. Not the most fuel efficiency car but hey, you get plenty of space and fun. When I got the car, I raised the stock boost from 0.6 bar to 1 bar and used it for like over 2 years. Everything was stock and I did not face a single problem.
Then I dump all possible Evo mods, TD05, cams, injectors, block, pnp, full exhaust, fuel pump, dyno-tune, bla bla bla. Upped the boost to 1.6 bar getting around 270whp. I manage to clock 5.9 secs from 0-100km/h. It was fun but trade off with some turbo lag.
However I sold it in 2016 because it was an old car with aging problems, my wife drives it and we cannot afford to keep having problems like stalling out of sudden, bad starter, bad ICV, bad MAF, jam calipers, weird noise during cold start and many more. Even though I kept replacing the bad parts, new problems keep coming up. Remember, the car is at least 15 years now.
If you use this as a weekend car for some fun, then go ahead. Suprima S is no way near. However if you plan to use it as daily cow cart, unless the condition is superb, else it will not be practical due to reliability issues.